Finding the Fourth Proportional to 10,111.42, 15,169.87 and 5,731.95

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111.42 : 15,169.87 = 5,731.95 : x
2. Step 2: Convert to fraction form
   10,111.42/15,169.87 = 5,731.95/x
3. Step 3: Cross multiply
   10,111.42x = 15,169.87 × 5,731.95
4. Step 4: Simplify right side
   10,111.42x = 86,952,936.35
5. Step 5: Solve for x
   x = 86,952,936.35/10,111.42
6. Step 6: Final answer
   x = 8,599.48